Sidney g



May 3 1927. 1,626,670

- s. 6. DOWN mo'roa VEHICLE BRAKE DEVICE Filed Feb. 9. 1923 I/III//I/III.

'IIIIIIIIIIIIIIIII INVENTOR SIDNEY G.DOWN

BY M

ATTORNEY internal expanding brake shoes drum cover plate 4 is provided, having a "Patented May 3, 192 7,

., I g I g 1,626,670f

SIDNEY G. Down, orri 'rrsnunen, PENNsY IlVANIA, ASSIGNOR T0 'THEWWESTING HOUSE AIR BRAKE company, OF WIL1YIERDI1VG, PENNSYLVANIA,A oonrona'rron PENNSYLVANIA. i

- MOTOR-VEHICLE BRAKE DEVICE.

Application filed February 9, 1923. Serial no} 618,162;

This invention relates to fluid pressure brakes, and more particularly to" a fluid pressure brake adapted for applicationto the trout wheel of a motor vehicle.

The principal object of my inventionnis to provide an improved front wheel fluid pressure controlled brake. I

In the accompanying drawing; Fig. 1 is a vertical section on the line 1 l of Fig. 2 of a fluid pressure brakeapplied to a front wheel and embodying my invention; Fig. 2 a section on the line 2 -2 of Fig. 1 andfFig. 3 a section on the line of Fig. 2.

y As shownin the drawing, a brake drunr 1 .18 applied to the front wheel 2 of a motor,

vehicle and Withinsaid drum are mounted A brake central rectangular depressed portion 5 to provide a space for the usual steering knuckle (3. f A lug 71s provided on the cover plate '45, the other end of which is apertured to receive the threaded endofthe steering arm 8, so that said lug may be clamped in position when" the steering nut 9 is screwed tight, for holding the cover" plate t in position. Anapertured lug 10 is also provided on the cover'plate 4, which is so positioned that the pivot pin 11 of the steering arm 8 will registerwith the aperture'in the lug, to provide an additional support for the coverplate, when the parts are assembled. a

At its upper portion, the cover plate 4 is depressed at 12 to form a half section of a diaphragm chamber, the, other half'section of the chamberbeing in'the formvof a cover plate 13 adapted to be secured to thedrum cover plate 4, so as toregister with the depressed 'p0rtion 12. WVithin the diaphragm chamber is a flexible diaphragm 14L adapted to operate a: diaphragm rod 15 and fluid under pressure for-operating said diaphragm is supplied thereto through a flexible hose '16; A lever is 'pivotally connected at i one end to a lug 18 carried by the cover I shoes 3 plate 4 and the other end of the lever is pivotally connected to the diaphragm rod v At an intermediate point, a wedge member 19 is pivotally connected to the lever 17 and saidwedge member 1 is interposed be tween the upper adjacent endsof the brakes The lower adjacent ends of the brake,

shoes 3 are "pivotally mounted ona pin 20 Whichis secured to the coverplate 4.

then operated so as to move the diaphragm roe 15 outwardly. The wedge member 19 is consequently moved so as to exert a wedging action on the adjacent engaging ends of the brake shoes .3 and thus cause the frictional engagement of the brake shoes "with the brake drum lto apply the brakes.

The abo,ve described construction is designed to be appliedto the front wheel of a motor vehicle so as to utilize, theexisting front wheel construction without modifica- Having now described my invention, what Lela-1m as newand desire to secure by Letters Patent, is

1. In an automotive brake, the combination with a brake drum associated with the,

front, wheel of a motor vehicle and a steermg knuckle for sa d wheel, of brake members mounted in said drum, a drum cover plate secured to said steering knuckle, and

a brake chamber formed in said cover plate and operatively connected i to said brake members. I v I a y 2. In an automotive brake, theocombination with a brake drum associated with the front wheel ofa motor vehicle, brake mem bers mounted in said drum and means for spreadingsaid members, of a cover plate for said drum, a brake chamber associated with said cover plate and formed in part by a depression in saidcover plate, and an operative connection between the brake chain her and said means. r r p 3.111 an automotive brake, the combination w th a brake drum associated with the front wheel of a motor vehicle, brake mem' bers mounted in said drum and means for ,spreadmg sald members, of a cover plate for sald drum, a brake chamber formed in part in the cover plate and in part by a cap section and having its axis parallel with the Y axis of the drum, and an operative connection between the'br'a-kechamber and said HIEZaIIS.

- 1. In an automotive brake, the combina tion with a brake drum associated with the front wheel of a motor vehicle and brake members mounted in said drum, of a cover plate for said drum, a brake chamber associated with said cover plate, a laterally movable. wedge for spreading said brake .n'ien'lbeis to i'rictionally engage the drum, a lever fnlcrumed on said cover plate and operatively connected to said brake chamber, and a member connecting said wedge to said lever. 10

In testimony whereof I have hereunto set my hand.

SIDNEY G. DOWVN. 

